/* Copyright 203-2115 AtomWare Technology Pty Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * The flowing information must be keep 
 * EnumTypeHandler.java
 * appbasic
 * 2014年7月3日上午11:56:33
 * @author 屈甲康
 * QQ285799123
 * mailto:qujiakang@gmail.com
 */

package org.jackysoft.mybatis.type;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedJdbcTypes;
import org.apache.ibatis.type.MappedTypes;


@MappedTypes(value =Enum.class)
@MappedJdbcTypes(value = JdbcType.INTEGER)
public class EnumTypeHandler<E extends Enum<E>> extends BaseTypeHandler<E> {

	private Log logger  = LogFactory.getLog(EnumTypeHandler.class);
	private Class<E> type;

	
	public EnumTypeHandler() {
		super();
		// TODO Auto-generated constructor stub
	}

	public EnumTypeHandler(Class<E> type) {
	    if (type == null) throw new IllegalArgumentException("Type argument cannot be null");
	    this.type = type;
	    logger.info("Enum type handler is registered ");
	}
	
	@Override
	public void setNonNullParameter(PreparedStatement ps, int i, E parameter,
			JdbcType jdbcType) throws SQLException {
		   ps.setInt(i, parameter.ordinal());
	}

	@Override
	public E getNullableResult(ResultSet rs, String columnName)
			throws SQLException {	
		int orai = rs.getInt(columnName);
		E[] es = type.getEnumConstants();
		return es==null?null:es[orai];
	}

	@Override
	public E getNullableResult(ResultSet rs, int columnIndex)
			throws SQLException {
		int orai = rs.getInt(columnIndex);
		E[] es = type.getEnumConstants();
		return es==null?null:es[orai];
	}

	@Override
	public E getNullableResult(CallableStatement cs, int columnIndex)
			throws SQLException {
		int orai = cs.getInt(columnIndex);
		E[] es = type.getEnumConstants();
		return es==null?null:es[orai];
	}


}
